UWB Base Station Anomaly Detection via Distance Residual Comparison
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Solution Overview
Problem
Existing UWB base station anomaly detection methods fail to detect displacement or blocking of UWB base stations, leading to inaccurate positioning results, as these anomalies cannot be detected by internal hardware circuits.
Innovation Solution
A method that involves establishing a first coordinate system based on UWB positioning systems, measuring distances between UWB base stations and a UWB tag, estimating spatial coordinates, and determining anomalies by comparing first and second distances to identify abnormal UWB base stations using threshold coefficients and sliding thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal hardware circuits like watchdog circuits are used for monitoring UWB base stations, then internal circuit anomalies can be detected in time, but anomalies caused by displacement or blocking of the UWB base station cannot be detected
Solution Approach 1:
The patent introduces a coordinate system as an intermediary reference framework and uses distance measurement as a mediator to indirectly detect base station status. Instead of relying solely on direct hardware monitoring, the system measures distances between the tag and multiple base stations, then compares these measurements with expected distances derived from coordinate geometry to detect anomalies caused by displacement or blocking.
Solution Approach 2:
The patent replaces the mechanical/hardware-based watchdog circuit monitoring system with a mathematical/computational detection system. By substituting physical hardware monitoring with coordinate-based distance calculation and comparison algorithms, the system achieves broader detection coverage that includes displacement and blocking scenarios that hardware circuits cannot detect.
2Measurement precision
If UWB base station displacement or blocking occurs, then positioning accuracy deteriorates, but these anomalies remain undetected by traditional monitoring methods
Solution Approach 1:
The patent implements a feedback mechanism where distance measurements are continuously compared against expected values calculated from known base station coordinates. When discrepancies exceed a threshold, the system identifies potential anomalies and can trigger corrective actions, creating a closed-loop detection system that maintains positioning accuracy by detecting and flagging abnormal conditions.
Solution Approach 2:
The patent uses multiple base stations (more than the minimum required for positioning) to create redundant measurements. This excessive action provides multiple data points for comparison, increasing the reliability of anomaly detection. By having more measurements than strictly necessary, the system can identify outliers and detect anomalies with higher confidence.
Data Source
AI summary
This application relates to a UWB base station anomaly detection method. The method includes: obtaining a first distance that is between each of the N UWB base stations and the UWB tag and that is obtained through measurement; obtaining an estimated value of spatial coordinates of the UWB tag in the first coordinate system based on the first distance and spatial coordinates of each UWB base station in the first coordinate system; obtaining a second distance between each UWB base station and the UWB tag based on the estimated value and the spatial coordinates of each UWB base station in the first coordinate system; and determining, based on the first distance and the second distance that correspond to each UWB base station, whether a UWB base station in the N UWB base stations is abnormal.